/* ============================================
   视觉艺术工坊 - 主样式表
   Art Gallery Enterprise Style
   ============================================ */

/* CSS Reset & Base */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --color-white: #FFFFFF;
  --color-charcoal: #1A1A1A;
  --color-rose-gold: #B76E79;
  --color-gray-100: #F8F8F8;
  --color-gray-200: #E8E8E8;
  --color-gray-300: #D0D0D0;
  --color-gray-500: #888888;
  --color-gray-700: #444444;
  --color-gray-900: #222222;
  --font-heading: 'Montserrat', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Noto Serif SC', 'Source Han Serif SC', Georgia, serif;
  --font-sans: 'Noto Sans SC', 'Source Han Sans SC', -apple-system, sans-serif;
  --max-width: 1200px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.8;
  color: var(--color-charcoal);
  background-color: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-rose-gold); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--color-charcoal); }

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-charcoal);
}

h1 { font-size: 2.8rem; margin-bottom: 1.5rem; }
h2 { font-size: 2.2rem; margin-bottom: 1.2rem; }
h3 { font-size: 1.6rem; margin-bottom: 1rem; }
h4 { font-size: 1.3rem; margin-bottom: 0.8rem; }

p { margin-bottom: 1.2rem; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
}

/* ============================================
   Header & Navigation
   ============================================ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-gray-200);
  transition: var(--transition);
}

.site-header.scrolled {
  box-shadow: 0 2px 20px rgba(0,0,0,0.08);
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
}

.site-logo {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--color-charcoal);
  letter-spacing: -0.5px;
}

.site-logo span { color: var(--color-rose-gold); }

.main-nav { display: flex; align-items: center; gap: 2rem; }

.main-nav a {
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-gray-700);
  position: relative;
  padding: 0.3rem 0;
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-rose-gold);
  transition: var(--transition);
}

.main-nav a:hover::after,
.main-nav a.active::after { width: 100%; }

.main-nav a:hover { color: var(--color-charcoal); }

.nav-cta {
  background: var(--color-charcoal) !important;
  color: var(--color-white) !important;
  padding: 0.6rem 1.4rem !important;
  border-radius: 4px;
  font-weight: 600 !important;
}

.nav-cta:hover { background: var(--color-rose-gold) !important; }

/* Mobile Menu */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 5px;
}

.menu-toggle span {
  width: 24px;
  height: 2px;
  background: var(--color-charcoal);
  transition: var(--transition);
}

/* ============================================
   Hero Section
   ============================================ */
.hero-section {
  position: relative;
  height: 100vh;
  min-height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: var(--color-charcoal);
}

.hero-video {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.5;
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(26,26,26,0.85) 0%, rgba(26,26,26,0.4) 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  color: var(--color-white);
  max-width: 800px;
  padding: 0 2rem;
}

.hero-content h1 {
  color: var(--color-white);
  font-size: 3.2rem;
  font-weight: 800;
  margin-bottom: 1.5rem;
  letter-spacing: -1px;
}

.hero-content p {
  font-size: 1.2rem;
  opacity: 0.85;
  margin-bottom: 2.5rem;
  font-family: var(--font-sans);
}

.hero-cta { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

.btn {
  display: inline-block;
  padding: 0.9rem 2.2rem;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 4px;
  transition: var(--transition);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--color-rose-gold);
  color: var(--color-white);
}

.btn-primary:hover {
  background: #a05d67;
  color: var(--color-white);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(183, 110, 121, 0.3);
}

.btn-outline {
  background: transparent;
  color: var(--color-white);
  border: 2px solid rgba(255,255,255,0.6);
}

.btn-outline:hover {
  background: var(--color-white);
  color: var(--color-charcoal);
  border-color: var(--color-white);
}

/* ============================================
   Section Styles
   ============================================ */
.section {
  padding: 6rem 0;
}

.section-dark {
  background: var(--color-gray-100);
}

.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

.section-header h2 {
  position: relative;
  display: inline-block;
}

.section-header h2::after {
  content: '';
  position: absolute;
  bottom: -12px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: var(--color-rose-gold);
}

.section-header p {
  margin-top: 1.5rem;
  color: var(--color-gray-500);
  font-family: var(--font-sans);
  font-size: 1rem;
}

/* ============================================
   Services Grid
   ============================================ */
.services-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
}

.service-card {
  position: relative;
  border-radius: 8px;
  overflow: hidden;
  aspect-ratio: 3/4;
  cursor: pointer;
}

.service-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
  filter: grayscale(30%);
}

.service-card:hover img {
  transform: scale(1.05);
  filter: grayscale(0%);
}

.service-card-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 2rem 1.5rem;
  background: linear-gradient(transparent, rgba(26,26,26,0.9));
  color: var(--color-white);
  transition: var(--transition);
}

.service-card h3 {
  color: var(--color-white);
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

.service-card p {
  font-size: 0.85rem;
  opacity: 0;
  transform: translateY(10px);
  transition: var(--transition);
  font-family: var(--font-sans);
}

.service-card:hover p {
  opacity: 0.9;
  transform: translateY(0);
}

/* ============================================
   Gallery / Portfolio
   ============================================ */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.gallery-item {
  position: relative;
  border-radius: 6px;
  overflow: hidden;
  aspect-ratio: 1;
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
  filter: grayscale(20%);
}

.gallery-item:hover img {
  transform: scale(1.03);
  filter: grayscale(0%);
}

.gallery-item:first-child {
  grid-column: span 2;
  grid-row: span 2;
  aspect-ratio: auto;
}

.gallery-item-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 1.5rem;
  background: linear-gradient(transparent, rgba(0,0,0,0.7));
  color: white;
  opacity: 0;
  transition: var(--transition);
}

.gallery-item:hover .gallery-item-overlay { opacity: 1; }

/* ============================================
   Workflow / Process
   ============================================ */
.workflow-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  position: relative;
}

.workflow-steps::before {
  content: '';
  position: absolute;
  top: 40px;
  left: 12.5%;
  right: 12.5%;
  height: 2px;
  background: var(--color-gray-200);
}

.workflow-step {
  text-align: center;
  position: relative;
}

.step-number {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--color-white);
  border: 3px solid var(--color-rose-gold);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.5rem;
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-rose-gold);
  position: relative;
  z-index: 2;
}

.workflow-step h4 {
  font-size: 1rem;
  margin-bottom: 0.5rem;
}

.workflow-step p {
  font-size: 0.85rem;
  color: var(--color-gray-500);
  font-family: var(--font-sans);
}

/* ============================================
   Team Section
   ============================================ */
.team-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 3rem;
}

.team-card {
  text-align: center;
}

.team-card img {
  width: 200px;
  height: 260px;
  object-fit: cover;
  border-radius: 6px;
  margin: 0 auto 1.5rem;
  filter: grayscale(100%);
  transition: var(--transition);
}

.team-card:hover img { filter: grayscale(0%); }

.team-card h4 { margin-bottom: 0.3rem; }

.team-card .role {
  color: var(--color-rose-gold);
  font-family: var(--font-sans);
  font-size: 0.85rem;
  margin-bottom: 0.8rem;
}

.team-card p {
  font-size: 0.9rem;
  color: var(--color-gray-500);
}

/* ============================================
   Clients / Brands
   ============================================ */
.clients-logos {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 3rem;
  flex-wrap: wrap;
  margin-bottom: 4rem;
}

.client-logo {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-gray-300);
  transition: var(--transition);
  padding: 1rem 1.5rem;
  border: 1px solid var(--color-gray-200);
  border-radius: 6px;
}

.client-logo:hover { color: var(--color-rose-gold); border-color: var(--color-rose-gold); }

.testimonials {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

.testimonial {
  padding: 2rem;
  background: var(--color-white);
  border-radius: 8px;
  border: 1px solid var(--color-gray-200);
}

.testimonial blockquote {
  font-style: italic;
  margin-bottom: 1rem;
  color: var(--color-gray-700);
  line-height: 1.8;
}

.testimonial cite {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  color: var(--color-gray-500);
  font-style: normal;
}

/* ============================================
   News / Articles
   ============================================ */
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.news-card {
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--color-gray-200);
  transition: var(--transition);
  background: var(--color-white);
}

.news-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.08);
}

.news-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.news-card-body {
  padding: 1.5rem;
}

.news-card-body .date {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  color: var(--color-gray-500);
  margin-bottom: 0.5rem;
}

.news-card-body h3 {
  font-size: 1.1rem;
  margin-bottom: 0.8rem;
}

.news-card-body p {
  font-size: 0.9rem;
  color: var(--color-gray-500);
  font-family: var(--font-sans);
}

/* ============================================
   Footer
   ============================================ */
.site-footer {
  background: var(--color-charcoal);
  color: var(--color-gray-300);
  padding: 4rem 0 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1.5fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-brand p {
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--color-gray-500);
  font-family: var(--font-sans);
}

.footer-col h4 {
  color: var(--color-white);
  font-size: 1rem;
  margin-bottom: 1.2rem;
  font-family: var(--font-heading);
}

.footer-col ul { list-style: none; }

.footer-col ul li { margin-bottom: 0.6rem; }

.footer-col ul li a {
  color: var(--color-gray-500);
  font-family: var(--font-sans);
  font-size: 0.85rem;
}

.footer-col ul li a:hover { color: var(--color-rose-gold); }

.footer-contact p {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  margin-bottom: 0.5rem;
  color: var(--color-gray-500);
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 2rem;
  text-align: center;
  font-family: var(--font-sans);
  font-size: 0.8rem;
  color: var(--color-gray-500);
}

/* ============================================
   Inner Pages
   ============================================ */
.page-hero {
  padding: 8rem 0 4rem;
  background: var(--color-gray-100);
  text-align: center;
}

.page-hero h1 { font-size: 2.4rem; }

.breadcrumb {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  color: var(--color-gray-500);
  margin-top: 1rem;
}

.breadcrumb a { color: var(--color-gray-500); }
.breadcrumb a:hover { color: var(--color-rose-gold); }

.content-section {
  padding: 4rem 0;
}

.article-content {
  max-width: 800px;
  margin: 0 auto;
}

.article-content p {
  margin-bottom: 1.5rem;
  text-align: justify;
}

.article-content h2 { margin-top: 3rem; }
.article-content h3 { margin-top: 2rem; }

.related-articles {
  margin-top: 4rem;
  padding-top: 3rem;
  border-top: 1px solid var(--color-gray-200);
}

/* ============================================
   Contact Page
   ============================================ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
}

.contact-form input,
.contact-form textarea,
.contact-form select {
  width: 100%;
  padding: 0.9rem 1.2rem;
  border: 1px solid var(--color-gray-200);
  border-radius: 4px;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  margin-bottom: 1.2rem;
  transition: var(--transition);
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--color-rose-gold);
}

.contact-form textarea { min-height: 150px; resize: vertical; }

.contact-info-card {
  padding: 2rem;
  background: var(--color-gray-100);
  border-radius: 8px;
  margin-bottom: 1.5rem;
}

.contact-info-card h4 { margin-bottom: 0.5rem; }

.contact-info-card p {
  font-family: var(--font-sans);
  font-size: 0.9rem;
  color: var(--color-gray-500);
}

/* ============================================
   Responsive Design (Mobile-First)
   ============================================ */
@media (max-width: 1024px) {
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .workflow-steps { grid-template-columns: repeat(2, 1fr); }
  .workflow-steps::before { display: none; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  html { font-size: 15px; }

  .menu-toggle { display: flex; }

  .main-nav {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--color-white);
    flex-direction: column;
    padding: 2rem;
    gap: 1.2rem;
    border-bottom: 1px solid var(--color-gray-200);
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
  }

  .main-nav.active {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }

  .hero-content h1 { font-size: 2.2rem; }
  .hero-content p { font-size: 1rem; }

  .services-grid { grid-template-columns: 1fr; }
  .gallery-grid { grid-template-columns: 1fr 1fr; }
  .gallery-item:first-child { grid-column: span 2; grid-row: span 1; }
  .news-grid { grid-template-columns: 1fr; }
  .team-grid { grid-template-columns: 1fr; }
  .testimonials { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .workflow-steps { grid-template-columns: 1fr 1fr; }

  .section { padding: 4rem 0; }
  h1 { font-size: 2rem; }
  h2 { font-size: 1.8rem; }
}

@media (max-width: 480px) {
  .gallery-grid { grid-template-columns: 1fr; }
  .gallery-item:first-child { grid-column: span 1; }
  .hero-cta { flex-direction: column; align-items: center; }
  .workflow-steps { grid-template-columns: 1fr; }
}